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- W1983529168 abstract "In this work, we report a density functional theory study of nitric oxide (NO) adsorption on close-packed transition metal (TM) Rh(111), Ir(111), Pd(111) and Pt(111) surfaces in terms of adsorption sites, binding mechanism and charge transfer at a coverage of ΘNO = 0.25, 0.50, 0.75 monolayer (ML). Based on our study, an unified picture for the interaction between NO and TM(111) and site preference is established, and valuable insights are obtained. At low coverage (0.25 ML), we find that the interaction of NO/TM(111) is determined by an electron donation and back-donation process via the interplay between NO 5σ/2π* and TM d-bands. The extent of the donation and back-donation depends critically on the coordination number (adsorption sites) and TM d-band filling, and plays an essential role for NO adsorption on TM surfaces. DFT calculations shows that for TMs with high d-band filling such as Pd and Pt, hollow-site NO is energetically the most favorable, and top-site NO prefers to tilt away from the normal direction. While for TMs with low d-band filling (Rh and Ir), top-site NO perpendicular to the surfaces is energetically most favorable. Electronic structure analysis show that irrespective of the TM and adsorption site, there is a net charge transfer from the substrate to the adsorbate due to overwhelming back-donation from the TM substrate to the adsorbed NO molecules. The adsorption-induced change of the work function with respect to bare surfaces and dipole moment is however site dependent, and the work function increases for hollow-site NO, but decreases for top-site NO, because of differences in the charge redistribution. The interplay between the energetics, lateral interaction and charge transfer, which is element dependent, rationalizes the structural evolution of NO adsorption on TM(111) surfaces in the submonolayer regime." @default.
- W1983529168 created "2016-06-24" @default.
- W1983529168 creator A5055160391 @default.
- W1983529168 creator A5066949504 @default.
- W1983529168 creator A5077065362 @default.
- W1983529168 date "2010-01-01" @default.
- W1983529168 modified "2023-10-03" @default.
- W1983529168 title "Theory of nitride oxide adsorption on transition metal (111) surfaces: a first-principles investigation" @default.
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- W1983529168 doi "https://doi.org/10.1039/b920857g" @default.
- W1983529168 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/20449360" @default.
- W1983529168 hasPublicationYear "2010" @default.
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